I. Decomposition of Core Selection Dimensions
1. Adaptability to Operational Environment
Site Space Constraints
Narrow areas (e.g., garden paths with width < 2.5m, construction in wooded areas): Choose mini-excavators with body width < 1.8m and height < 2.5m (1-3 ton class), such as HW10, HW17, etc.
Open spaces (e.g., squares, surroundings of artificial lakes): Select 3-6 ton class models for balanced efficiency and flexibility, such as HW35, HW60.
Ground Bearing Capacity
Lawns and soft soil areas: Prioritize crawler excavators (ground contact pressure < 30kPa) to avoid surface compaction by wheeled models.
Hardened pavement construction: Wheeled models (e.g., HWL40) are optional for more convenient mobility.
2. Matching Degree of Operational Functions
Earthwork and Terrain Engineering
Terrain leveling and trench excavation (depth < 2m): Choose models with bucket capacity of 0.1-0.3 m³. The bucket tooth strength should adapt to soil types (wide teeth for clay, pointed teeth for rocks).
Greening Planting Operations
Tree pit excavation (diameter < 1.5m, depth < 1.2m): Prioritize models equipped with spiral drilling attachments, which can improve efficiency by 3 times compared to traditional buckets.
II. Key Parameter Comparison Table
Parameter Type Small Excavators (1-3 Ton Class) Medium-Small Excavators (3-6 Ton Class) Overall Weight 1-3 tons 3-6 tons Maximum Digging Depth 2.5-3.5 meters 3.5-5 meters Bucket Capacity 0.05-0.3 cubic meters 0.2-0.5 cubic meters Engine Power 10-30kW 30-60kW Climbing Ability 30°-45° 35°-50° Applicable Scenarios Refined operations, narrow spaces Moderate-intensity earthwork, landscape infrastructure
